Search space group switching method and device

Abstract

An embodiment of the present application discloses a search space group switching method and device, which can be applied to a terminal, including: switching between at least two search space groups; performing corresponding physical downlink control channel (PDCCH) monitoring behavior according to the switched search space group; wherein the at least two search space groups include search space group #2, and the search space group #2 is not associated with any search space or is not associated with the first search space, and the first search space includes: a first type common search space CSS, a user-specific search space USS, and at least one CSS other than the first type CSS.

Description

Technical Field

[0001] The present application belongs to the field of communication technology, and in particular relates to a search space group switching method and device (the device may include a search space group switching device and a terminal). Background Art

[0002] The communication system introduces two search space groups (SS groups). The Type 3 Physical Downlink Control Channel Common Search Space set (Type 3 PDCCH CSS set) or the UE-Specific Search Space (USS) set can be linked to these two search space groups. Terminals must continuously monitor other common search space sets (Type 0 / 0A / 1 / 2) that do not belong to these search space groups. Currently, switching between these two SS groups achieves limited PDCCH monitoring effectiveness, which is not conducive to terminal energy conservation. Summary of the Invention

[0003] The embodiments of the present application provide a search space group switching method and device, which can solve the problem that the PDCCH monitoring effect is limited due to having only two search space groups, which is not conducive to terminal energy saving.

[0004] In a first aspect, a search space group switching method is provided, which is applied to a terminal, and the method includes: switching between at least two search space groups; performing corresponding physical downlink control channel (PDCCH) monitoring behavior according to the switched search space group; wherein the at least two search space groups include search space group #2, and the search space group #2 is not associated with any search space or is not associated with a first search space, and the first search space includes: a first type common search space CSS, a user-specific search space USS, and at least one CSS other than the first type CSS.

[0005] According to a second aspect, a search space group switching device is provided, comprising: a switching module for switching between at least two search space groups; a PDCCH monitoring module for performing corresponding PDCCH monitoring behavior according to the switched search space group; wherein the at least two search space groups include search space group #2, and the search space group #2 is not associated with any search space or is not associated with the first search space, and the first search space includes: a first type common search space CSS, a user-specific search space USS, and at least one item of CSS other than the first type CSS.

[0006] In a third aspect, a terminal is provided, comprising a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the method described in the first aspect.

[0007] In a fourth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the method described in the first aspect is implemented.

[0008] In a fifth aspect, a computer program product is provided, which includes a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein when the program or instruction is executed by the processor, the method described in the first aspect is implemented.

[0009] In a sixth aspect, a chip is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to run a program or instruction to implement the method described in the first aspect.

[0010] In an embodiment of the present application, by introducing search space group #2, a more flexible and diverse PDCCH monitoring effect can be achieved; when search space group #2 is not associated with any search space, the terminal switches to search space group #2 to skip PDCCH monitoring, thereby achieving the purpose of terminal energy saving; when search space group #2 is not associated with the first search space, when the terminal switches to search space group #2, at least there is no need to monitor the first search space, which also facilitates terminal energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic diagram of a wireless communication system according to an embodiment of the present application;

[0012] Figure 2 is a schematic flowchart of a search space group switching method according to an embodiment of the present application;

[0013] Figure 3 is a structural diagram of a search space group switching device according to an embodiment of the present application;

[0014] Figure 4 is a structural diagram of a communication device according to an embodiment of the present application;

[0015] Figure 5 It is a structural diagram of a terminal according to an embodiment of the present application. DETAILED DESCRIPTION

[0016] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0017] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first" and "second" are generally of the same type, and do not limit the number of objects. For example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0018] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) and other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the technology described can be used for the systems and radio technologies mentioned above, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and NR terminology is used in most of the following description, but these technologies can also be applied to applications other than NR system applications, such as 6th generation (6G) systems. th Generation, 6G) communication system.

[0019] Figure 1A schematic diagram of a wireless communication system applicable to an embodiment of the present application is shown. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 can also be referred to as a terminal device or a user terminal (UE). The terminal 11 can be a mobile phone, a tablet personal computer, a laptop computer or a notebook computer, a personal digital assistant (PDA), a handheld computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile Internet device (MID), a wearable device (Wearable Device) or a vehicle-mounted device (VUE), a pedestrian terminal (PUE) and other terminal-side devices. Wearable devices include: bracelets, headphones, glasses, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 can be a base station or a core network, where the base station can be called a node B, an evolved node B, an access point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), a B node, an evolved B node (eNB), a next generation node B (gNB), a home B node, a home evolved B node, a WLAN access point, a WiFi node, a transmitting and receiving point (Transmitting Receiving Point, TRP) or other appropriate terms in the field. As long as the same technical effect is achieved, the base station is not limited to a specific technical vocabulary. It should be noted that in the embodiment of the present application, only the base station in the NR system is taken as an example, but the specific type of the base station is not limited.

[0020] The search space group switching method and device provided in the embodiments of the present application are described in detail below with reference to specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0021] like Figure 2 As shown, an embodiment of the present application provides a search space group switching method 200, which can be executed by a terminal. In other words, the method can be executed by software or hardware installed in the terminal, and the method includes the following steps.

[0022] S202: Switch between at least two search space groups.

[0023] Optionally, before S202, the terminal may further receive configuration information from a network-side device, where the configuration information is used to configure the at least two search space groups for the terminal.

[0024] In this embodiment, the terminal can implement switching between at least two search space groups according to triggering mechanisms such as receiving downlink control information (DCI) indication, obtaining network side device configuration, and timer status change.

[0025] S204: Execute corresponding physical downlink control channel (PDCCH) monitoring behavior according to the switched search space group; the at least two search space groups include search space group #2, and search space group #2 is not associated with any search space or is not associated with the first search space.

[0026] The first search space includes at least one of: a first-type common search space (CSS), a user-specific search space (USS), and a CSS other than the first-type CSS. For example, the first search space includes the first-type CSS; the first search space includes the first-type CSS and the USS; the first search space includes the type USS and a CSS other than the first-type CSS; the first search space includes the first-type CSS and a CSS other than the first-type CSS, that is, the first search space includes all types of CSSs.

[0027] Optionally, the first type CSS may be a type 3 CSS.

[0028] It can be understood that when search space group #2 is not associated with any search space, the terminal can skip PDCCH monitoring by switching to search space group #2, thereby achieving terminal energy saving; when search space group #2 is not associated with the first search space, the terminal does not need to monitor the first search space when switching to search space group #2, which also facilitates terminal energy saving.

[0029] It should be noted that skipping PDCCH monitoring refers to skipping monitoring of PDCCHs other than Type 0 / 0A / 1 / 2 CSS.

[0030] The at least two search space groups mentioned in the embodiments of the present application may include, in addition to search space group #2, at least one of the following:

[0031] 1) Search space group #0

[0032] In one embodiment, search space group #0 is associated with a search space of a sparse physical downlink control channel (PDCCH) monitoring period. Switching a terminal to search space group #0 can reduce PDCCH monitoring, thereby facilitating terminal energy saving, but the scheduling delay may be relatively increased.

[0033] 2) Search space group #1

[0034] In one embodiment, search space group #1 is associated with a search space of a dense PDCCH monitoring period. Switching the terminal to search space group #1 can reduce scheduling delay, but terminal power consumption may increase relatively.

[0035] Optionally, the network side configuration or protocol stipulates that search space group #0 or search space group #1 is the default search space group.

[0036] It should be noted that the embodiment of the present application does not limit the search spaces associated with search space group #0 and search space group #1.

[0037] The search space group switching method provided in the embodiment of the present application can achieve more flexible and diverse PDCCH monitoring effects by introducing search space group #2; when search space group #2 is not associated with any search space, the terminal can skip PDCCH monitoring by switching to search space group #2, thereby achieving the purpose of terminal energy saving; when search space group #2 is not associated with the first search space, when the terminal switches to search space group #2, at least there is no need to monitor the first search space, which also facilitates terminal energy saving.

[0038] The following will be divided into multiple embodiments, taking the switching (or conversion) method between the above three search space groups as an example for detailed description.

[0039] Option 1

[0040] The at least two search space groups mentioned in embodiment 200 include search space group #0 and / or search space group #1. Thus, the terminal switching between the at least two search space groups in S202 includes at least one of the following:

[0041] 1) Switching from the search space group #0 to the search space group #1;

[0042] 2) Switching from the search space group #0 to the search space group #2.

[0043] In solution 1, the terminal may perform the search space group switching process of 1) or 2) above according to the instruction of the first downlink control information (Downlink Control Information, DCI).

[0044] It should be noted that, in this embodiment, switching from search space group 1 to search space group 2 can be understood as switching from search space group 1 to search space group 2 when the terminal currently uses search space group 1. This can also be understood in the following examples and will not be repeated here.

[0045] In this example, the terminal switches between at least two search space groups, including at least one of the following: 1) when the terminal uses the search space group #0, if the first indication obtained is a first value, switching from the search space group #0 to the search space group #1; 2) when the terminal uses the search space group #0, if the first indication obtained is a second value, switching from the search space group #0 to the search space group #2; wherein the first indication is carried in the first DCI.

[0046] In this example, the first DCI may be a DCI for scheduling data, or a DCI for not scheduling data.

[0047] For example, the first DCI is DCI format 1-1. A first indication is added to DCI format 1-1, indicating switching from search space group #0 to search space group #1 or from search space group #0 to search space group #2. The first indication may occupy one bit. A first indication of '0' indicates switching from search space group #0 to search space group #1, and a first indication of '1' indicates switching from search space group #0 to search space group #2.

[0048] The newly added first indication mentioned in the above example is used to indicate the search space group switching process described in 1) and 2). In addition, the function of the existing indication field in the DCI (such as an indication field with other functions or a reserved indication field in the DCI) can be indicated by a second indication to achieve the indication of the search space group switching described in 1) and 2).

[0049] For example, the first DCI mentioned in the above example may also include a second indication, and the second indication satisfies at least one of the following: 1) if the second indication obtained is a third value, the preset indication field is used for the first indication; 2) if the second indication obtained is a fourth value, the preset indication field is used for the preset indication.

[0050] In this embodiment, a function reuse indication (i.e., a second indication) of a new indication field is added to the first DCI, and the function for which the preset indication field is used is determined based on the function reuse indication of the indication field. For example, the second indication is added to the first DCI with a value of 1 bit, and the above-mentioned preset indication field is the minimum available scheduling offset indication field in DCI format 1-1. The second indication is '0', indicating that the minimum available scheduling offset indication field (i.e., the preset indication field) is used for the minimum available scheduling offset indication, and the second indication is '1', indicating that the minimum available scheduling offset indication field is used for the above-mentioned 1) and 2) search space group switching indication, that is, for the first indication.

[0051] In solution one, the above 1) and 2) search space group switching can also be performed by bundling the indication with the third indication field in the first DCI. The third indication field can be: minimum available scheduling offset indication, skip PDCCH monitoring indication, bandwidth part (BandWidth Part, BWP) switching indication, etc.

[0052] In this example, the terminal switches between at least two search space groups, including at least one of the following: 1) when the terminal uses the search space group #0, if the minimum available scheduling offset indicated by the minimum available scheduling offset indication is equal to 0, then switching from the search space group #0 to the search space group #1; 2) when the terminal uses the search space group #0, if the minimum available scheduling offset indicated by the minimum available scheduling offset indication is greater than 0, then switching from the search space group #0 to the search space group #2.

[0053] This example uses the bundling indication method, which eliminates the need to add a new indication field in the first DCI and can reduce signaling resource overhead.

[0054] Option 2

[0055] Solution 1 mainly introduces how the terminal determines whether to switch from search space group #0 to search space group #1 or from search space group #0 to search space group #2. Solution 2 mainly introduces how the terminal switches from search space group #2 to search space group #0 or from the search space group #2 to the default search space group, wherein the default search space group is any one of the at least two search space groups.

[0056] The at least two search space groups mentioned in embodiment 200 also include search space group #0. In this way, the terminal in S202 switches between at least two search space groups, including: switching from the search space group #2 to the search space group #0 or switching from the search space group #2 to the default search space group.

[0057] In solution 2, the terminal may switch between the search space groups according to the first timer.

[0058] In this example, the terminal switching from search space group #2 to search space group #0 includes: when the terminal uses search space group #2, after a first timer times out (or expires) or after a first time interval after the first timer times out, switching from search space group #2 to search space group #0 or switching from search space group #2 to the default search space group. For example, when the terminal uses search space group #2, the terminal performs the step of switching from search space group #2 to search space group #0 after the first timer times out; for another example, when the terminal uses search space group #2, the terminal performs the step of switching from search space group #2 to search space group #0 3 ms after the first timer times out. The first timer is used to switch from search space group #2 to search space group #0 or to switch from search space group #2 to the default search space group.

[0059] In addition, in this embodiment, when the terminal switches from another search space group (such as #0 or #1) to search space group #2, the first timer is started or restarted; after the first timer times out (expires) or after a first time interval after the first timer times out, the terminal switches from search space group #2 to (falls back to) search space group #0. At this time, the network side configures search space group #0 as the default search space group. The first timer is used to switch from search space group #2 to search space group #0 or to switch from search space group #2 to the default search space group. The default search space group in this embodiment can be any one of the at least two search space groups mentioned in Example 200.

[0060] Optionally, the counting unit of the first timer may be: a time slot, a millisecond, or a discontinuous reception (DRX) cycle, etc.

[0061] In solution 2, the terminal may also switch the search space group according to the detected second DCI.

[0062] In this example, the terminal switches between at least two search space groups, including: when the terminal uses the search space group #2, if a second DCI is received or detected, switching from the search space group #2 to the search space group #0 or switching from the search space group #2 to the default search space group.

[0063] Optionally, the second DCI may be scrambled by a specific Radio Network Temporary Identity (RNTI); and / or the search space carrying the second DCI is a search space of a specific type. For example, the second DCI is scrambled by a cell radio network temporary identity (C-RNTI); and for another example, the search space type carrying the second DCI is CSS.

[0064] For example, the current terminal uses search space group #2, and search space group #2 is not associated with any search space. When the terminal detects C-RNTI-scrambled DCI format 1-0 during the PDCCH monitoring opportunity of type 3CSS, it switches from search space group #2 to the default search space group. For example, the network configures the default search space group to be search space group #0, that is, switches from search space group #2 to search space group #0.

[0065] The above two examples of Solution 2 mainly describe that the terminal performs search space group switching based on the first timer and whether the second DCI is detected. In other embodiments, when the terminal is using search space group #2, if the third DCI is detected, the terminal continues to use search space group #2, that is, no search space group switching is performed.

[0066] Optionally, the third DCI may be scrambled by a group common RNTI or a broadcast RNTI. For example, the third DCI may be scrambled by a slot format indicator (SFI)-RNTI, a power saving (PS)-RNTI, a paging (P-RNTI), or a RA-RNTI.

[0067] In this embodiment, the terminal may further start or restart a first timer after detecting the third DCI. The function of the first timer can be described above, i.e., it is used by the terminal to switch from search space group #2 to search space group #0 or a default search space group. The counting unit of the first timer may be a time slot, a millisecond, or a DRX cycle. The default search space group in this embodiment may be any one of the at least two search space groups mentioned in embodiment 200.

[0068] Optionally, in Solution 1 and Solution 2, the terminal may not support direct switching between search space group #1 and search space group #2. For example, network-side configuration or protocol agreement may stipulate that the terminal does not support direct switching between search space group #2 and search space group #1. Direct switching refers to switching from search space group #1 to search space group #2, or switching from search space group #2 to search space group #1.

[0069] This embodiment can skip PDCCH monitoring by switching to search space group #2, thereby achieving terminal energy saving, while maximally applying the existing search space group switching mechanism. At the same time, compared with solution three to be introduced below, signaling overhead can be saved.

[0070] Option 3

[0071] In solution three, the terminal supports switching between any two of the default search space group, search space group #0, search space group #1, and search space group #2, which can realize flexible search space group switching and achieve different PDCCH monitoring effects.

[0072] The at least two search space groups mentioned in embodiment 200 further include search space group #0 and / or search space group #1. Thus, the terminal switching between the at least two search space groups in S202 includes at least one of the following:

[0073] 1) Switching from the search space group #2 to the search space group #0;

[0074] 2) Switching from the search space group #2 to the search space group #1;

[0075] 3) Switching from the search space group #2 to a default search space group, wherein the default search space group is any one of the at least two search space groups.

[0076] In solution three, the terminal may switch between the search space groups according to the first timer.

[0077] In this example, the terminal switching from search space group #2 to search space group #0 or switching from search space group #2 to the default search space group includes: when the terminal is using search space group #2, after a first timer times out (expires) or after a first time interval after the first timer times out, switching from search space group #2 to search space group #0 or switching from search space group #2 to the default search space group. The default search space group in this embodiment can be any one of the at least two search space groups mentioned in embodiment 200.

[0078] In addition, in this embodiment, when the terminal switches from another search space group (such as #0 or #1) to search space group #2, the first timer is started or restarted; after the first timer times out (expires) or after a first time interval after the first timer times out, the terminal switches from search space group #2 to (falls back to) search space group #0. At this time, the network side configures search space group #0 as the default search space group. The first timer is used to switch from search space group #2 to search space group #0 or to switch from search space group #2 to the default search space group.

[0079] Optionally, the counting unit of the first timer may be: time slot, millisecond or DRX cycle, etc.

[0080] In solution three, the terminal may also switch the search space group according to the detected second DCI.

[0081] In this example, the terminal switching between the at least two search space groups includes: when the terminal uses the search space group #2, if the second DCI is received or detected, performing at least one of the following:

[0082] 1) Switching from the search space group #2 to the search space group #0;

[0083] 2) Switching from the search space group #2 to the search space group #1;

[0084] 3) Switch from the search space group #2 to the default search space group.

[0085] In this embodiment, the terminal can also determine to switch from the search space group #2 to the search space group #0 or from the search space group #2 to the search space group #1 or from the search space group #2 to the default search space group based on the network side device configuration, predefined rules (such as protocol agreement), and at least one item in the second DCI.

[0086] For example, when the terminal is using search space group #2, the Radio Resource Control (RRC) configures the terminal to switch from search space group #2 to search space group #1 upon receiving (detecting) the second DCI. For another example, when the terminal is using search space group #2, the second DCI instructs the terminal to switch from search space group #2 to search space group #1, either the default search space group or search space group #0.

[0087] Optionally, the second DCI is scrambled by a specific RNTI; and / or the search space carrying the second DCI is a search space of a specific type. For example, the second DCI is scrambled by a C-RNTI. For another example, the search space type carrying the second DCI is CSS.

[0088] For example, the current terminal uses search space group #2, and search space group #2 is not associated with any search space. When the terminal detects C-RNTI-scrambled DCI format 1-0 during the PDCCH monitoring opportunity of type 3CSS, it switches from search space group #2 to the default search space group. For example, the network configures the default search space group to be search space group #0, that is, switches from search space group #2 to search space group #0.

[0089] The above two examples of Solution 3 mainly introduce that the terminal performs search space group switching based on the first timer and whether the second DCI is detected. In other embodiments, when the terminal is using search space group #2, if the third DCI is detected, the terminal continues to use search space group #2, that is, no search space group switching is performed.

[0090] Optionally, the third DCI is scrambled by a group common RNTI or a broadcast RNTI. Specifically, for example, the third DCI is scrambled by a slot format indicator SFI-RNTI or a power saving PS-RNTI, a paging P-RNTI, or a RA-RNTI.

[0091] In this embodiment, the terminal may further start or restart a first timer after detecting the third DCI. The function of the first timer can be described above, i.e., it is used by the terminal to switch from search space group #2 to search space group #0 or to switch from search space group #2 to a default search space group. The counting unit of the first timer may be a time slot, a millisecond, or a DRX cycle.

[0092] The above examples of Scheme 3 mainly introduce how the terminal switches from search space group #2 to search space group #1, the default search space group or search space group #0. How the terminal switches from search space group #1 or search space group #0 to search space group #2 can refer to the introduction of the embodiments of Schemes 1 to 3 above. For example, according to the DCI indication, the search space group #2 is switched from search space group #1 or search space group #0; for another example, if no DCI is detected during the timer operation, the search space group #2 is switched from search space group #1 or search space group #0 after the timer expires.

[0093] Option 4

[0094] In this solution, the terminal switching between the at least two search space groups includes: switching the search space group of the target cell group between the at least two search space groups based on target information; wherein the target information includes at least one of the following: a secondary cell dormancy or de-dormancy indication, and a secondary cell activation or deactivation indication; and the target cell group is a cell group other than the cell group to which the cell indicated by the target information belongs. This solution is applicable to scenarios where a network-side device is configured with carrier aggregation of multiple serving cells. The cell group can be configured by the network-side device, for example, where the cell group is equal to the dormant secondary cell group.

[0095] In the first example, the at least two search space groups further include search space group #0 and / or search space group #1; when the target information includes a secondary cell desleeping indication or a secondary cell activation indication, the switching of the search space group of the target cell group between the at least two search space groups according to the target information includes at least one of the following:

[0096] 1) switching the search space group of the cell group using the search space group #2 in the target cell group to the search space group #0 or the search space group #1;

[0097] 2) Switch the search space group of the cell group using search space group #0 in the target cell group to search space group #1.

[0098] In a second example, the at least two search space groups further include search space group #0 and / or search space group #1; when the target information includes a secondary cell sleep indication or a secondary cell deactivation indication, the switching of the search space group of the target cell group between the at least two search space groups according to the target information includes at least one of the following:

[0099] 1) switching the search space group of the cell group using search space group #1 in the target cell group to search space group #0 or search space group #2;

[0100] 2) Switching the search space group of the cell group using search space group #0 in the target cell group to the search space group #2.

[0101] Optionally, after switching to search space group #2, this embodiment may further start or restart a first timer, where the first timer is used to switch from search space group #2 to search space group #0 or to switch from search space group #2 to a default search space group. The default search space group in this embodiment may be any one of the at least two search space groups mentioned in embodiment 200.

[0102] It should be noted that the first timer mentioned in various embodiments of this specification may be the same timer.

[0103] In the second example, switching the search space group of the target cell group between at least two search space groups according to the target information includes: if no DCI is detected during the operation of the second timer, switching the search space group of the target cell group between at least two search space groups according to the target information.

[0104] In this example, when the terminal receives a secondary cell sleep indication or a secondary cell deactivation indication, the terminal starts or restarts the second timer. If no DCI is detected during the operation of the second timer, after the second timer expires, the search space group of the target cell group is switched between at least two search space groups according to the introduction of the second example above.

[0105] It should be noted that the search space group switching method provided in the embodiments of the present application can be executed by a search space group switching device, or by a control module in the search space group switching device for executing the search space group switching method. The embodiments of the present application take the search space group switching device executing the search space group switching method as an example to illustrate the search space group switching device provided in the embodiments of the present application.

[0106] Figure 3 1 is a schematic diagram of the structure of the search space group switching device according to an embodiment of the present application, which may correspond to the terminal in other embodiments. Figure 3 As shown, the apparatus 300 includes:

[0107] A switching module 302 may be configured to switch between at least two search space groups;

[0108] The PDCCH monitoring module 304 may be configured to perform corresponding PDCCH monitoring behavior according to the switched search space group;

[0109] Among them, the at least two search space groups include search space group #2, and the search space group #2 is not associated with any search space or is not associated with the first search space. The first search space includes: a first type of public search space CSS, a user-specific search space USS, and at least one CSS other than the first type CSS.

[0110] The search space group switching device provided in the embodiment of the present application can achieve more flexible and diverse PDCCH monitoring effects by introducing search space group #2; when search space group #2 is not associated with any search space, switching to search space group #2 can skip PDCCH monitoring, thereby achieving the purpose of energy saving; when search space group #2 is not associated with the first search space, when switching to search space group #2, at least there is no need to monitor the first search space, which also facilitates energy saving.

[0111] Optionally, as an embodiment, the at least two search space groups further include search space group #0 and / or search space group #1; and the switching module 302 is configured to perform at least one of the following:

[0112] Switching from the search space group #0 to the search space group #1;

[0113] Switch from the search space group #0 to the search space group #2.

[0114] Optionally, as an embodiment, the switching module 302 is configured to perform at least one of the following:

[0115] In the case of using the search space group #0, if the first indication obtained is a first value, switching from the search space group #0 to the search space group #1;

[0116] In the case of using the search space group #0, if the first indication obtained is the second value, switching from the search space group #0 to the search space group #2 is performed.

[0117] The first indication is carried in first downlink control information DCI.

[0118] Optionally, as an embodiment, the first DCI further includes a second indication, where the second indication satisfies at least one of the following:

[0119] If the second indication obtained is the third value, the preset indication field is used for the first indication;

[0120] If the acquired second indication is the fourth value, the preset indication field is used for the preset indication.

[0121] Optionally, as an embodiment, the switching module 302 is configured to perform at least one of the following:

[0122] In the case where the terminal uses the search space group #0, if the minimum available scheduling offset indicated by the acquired minimum available scheduling offset indication is equal to 0, switching from the search space group #0 to the search space group #1;

[0123] In the case where the terminal uses the search space group #0, if the minimum available scheduling offset indicated by the acquired minimum available scheduling offset indication is greater than 0, it switches from the search space group #0 to the search space group #2.

[0124] Optionally, as an embodiment, the at least two search space groups further include search space group #0 and / or search space group #1; and the switching module 302 is configured to perform at least one of the following:

[0125] Switching from the search space group #2 to the search space group #0;

[0126] Switching from the search space group #2 to the search space group #1;

[0127] Switching from the search space group #2 to a default search space group, wherein the default search space group is any one of the at least two search space groups.

[0128] Optionally, as an embodiment, the switching from the search space group #2 to the search space group #0 or the switching from the search space group #2 to the default search space group includes:

[0129] In the case where the terminal uses the search space group #2, after a first timer expires or after a first time interval after the first timer expires, it switches from the search space group #2 to the search space group #0 or switches from the search space group #2 to the default search space group.

[0130] Optionally, as an embodiment, the apparatus 300 further includes:

[0131] A control module, configured to start or restart a first timer after switching to the search space group #2;

[0132] The first timer is used to switch from the search space group #2 to the search space group #0 or to switch from the search space group #2 to the default search space group.

[0133] Optionally, as an embodiment, the switching module 302 is configured to perform at least one of the following:

[0134] In the case of using the search space group #2, if the second DCI is detected, at least one of the following is performed:

[0135] Switching from the search space group #2 to the search space group #0;

[0136] Switching from the search space group #2 to the search space group #1;

[0137] Switch from the search space group #2 to the default search space group.

[0138] Optionally, as an embodiment,

[0139] The second DCI is scrambled by a specific radio network temporary identifier RNTI; and / or

[0140] The search space carrying the second DCI is a search space of a specific type.

[0141] Optionally, as an embodiment, the switching module 302 is also used to determine, based on the network side device configuration, predefined rules, and at least one item in the second DCI, whether to switch from the search space group #2 to the search space group #0 or from the search space group #2 to the search space group #1 or from the search space group #2 to the default search space group.

[0142] Optionally, as an embodiment, the switching module 302 is further configured to, when using the search space group #2, continue to use the search space group #2 if a third DCI is detected.

[0143] Optionally, as an embodiment, the third DCI is scrambled by a group common RNTI or a broadcast RNTI.

[0144] Optionally, as an embodiment, the apparatus 300 further includes:

[0145] A control module, configured to start or restart a first timer after detecting the third DCI;

[0146] The first timer is used to switch from the search space group #2 to the search space group #0 or to switch from the search space group #2 to the default search space group.

[0147] Optionally, as an embodiment, the network side configuration or protocol stipulates that the search space group switching device 300 does not support direct switching between the search space group #2 and the search space group #1.

[0148] Optionally, as an embodiment, the counting unit of the first timer is: time slot, millisecond, discontinuous reception DRX cycle.

[0149] Optionally, as an embodiment, the switching module 302 is configured to switch the search space group of the target cell group between at least two search space groups according to the target information;

[0150] The target information includes at least one of the following: a secondary cell sleep or desleep indication, a secondary cell activation or deactivation indication; and the target cell group is a cell group other than the cell group to which the cell indicated by the target information belongs.

[0151] Optionally, as an embodiment, the at least two search space groups further include search space group #0 and / or search space group #1; when the target information includes a secondary cell desleep indication or a secondary cell activation indication, the switching module 302 is configured to perform at least one of the following:

[0152] Switching the search space group of the cell group using the search space group #2 in the target cell group to the search space group #0 or the search space group #1;

[0153] The search space group of the cell group using the search space group #0 in the target cell group is switched to the search space group #1.

[0154] Optionally, as an embodiment, the at least two search space groups further include search space group #0 and / or search space group #1; when the target information includes a secondary cell sleep indication or a secondary cell deactivation indication, the switching module 302 is configured to perform at least one of the following:

[0155] Switching the search space group of the cell group using the search space group #1 in the target cell group to the search space group #0 or the search space group #2;

[0156] The search space group of the cell group using the search space group #0 in the target cell group is switched to the search space group #2.

[0157] Optionally, as an embodiment, the switching module 302 is configured to switch the search space group of the target cell group between at least two search space groups according to the target information if no DCI is detected during the running of the second timer.

[0158] According to the device 300 of the embodiment of the present application, the process of the method 200 corresponding to the embodiment of the present application can be referred to, and the various units / modules in the device 300 and the above-mentioned other operations and / or functions are respectively for implementing the corresponding processes in the method 200, and can achieve the same or equivalent technical effects. For the sake of brevity, they will not be repeated here.

[0159] The search space group switching device in the embodiments of the present application can be a device, or a component, integrated circuit, or chip in a terminal. The device can be a mobile terminal or a non-mobile terminal. For example, mobile terminals can include, but are not limited to, the types of terminals 11 listed above. Non-mobile terminals can include servers, network attached storage (NAS), personal computers (PCs), televisions (TVs), ATMs, or self-service kiosks, etc., and are not specifically limited in the embodiments of the present application.

[0160] The search space group switching device in the embodiment of the present application may be a device having an operating system. The operating system may be an Android operating system, an iOS operating system, or other possible operating systems, which are not specifically limited in the embodiment of the present application.

[0161] The search space group switching device provided in the embodiment of the present application can achieve Figure 2 The various processes implemented by the method embodiment achieve the same technical effect and are not described here again to avoid repetition.

[0162] Optional, such as Figure 4 As shown, an embodiment of the present application also provides a communication device 400, including a processor 401, a memory 402, and a program or instruction stored in the memory 402 and executable on the processor 401. For example, when the communication device 400 is a terminal, the program or instruction is executed by the processor 401 to implement the various processes of the above-mentioned search space group switching method embodiment and to achieve the same technical effect.

[0163] Figure 5 A schematic diagram of the hardware structure of a terminal for implementing an embodiment of the present application.

[0164] The terminal 500 includes but is not limited to components such as a radio frequency unit 501 , a network module 502 , an audio output unit 503 , an input unit 504 , a sensor 505 , a display unit 506 , a user input unit 507 , an interface unit 508 , a memory 509 , and a processor 510 .

[0165] Those skilled in the art will understand that the terminal 500 may also include a power supply (such as a battery) to power each component, and the power supply may be logically connected to the processor 510 through a power management system, thereby implementing functions such as charging, discharging, and power consumption management through the power management system. Figure 5 The terminal structure shown in the figure does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be repeated here.

[0166] It should be understood that in an embodiment of the present application, the input unit 504 may include a graphics processing unit (GPU) 5041 and a microphone 5042, and the graphics processor 5041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 506 may include a display panel 5061, and the display panel 5061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 507 includes a touch panel 5071 and other input devices 5072. The touch panel 5071 is also called a touch screen. The touch panel 5071 may include two parts: a touch detection device and a touch controller. Other input devices 5072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and an operating stick, which will not be repeated here.

[0167] In this embodiment of the present application, the radio frequency unit 501 receives downlink data from the network-side device and transmits it to the processor 510 for processing. Furthermore, the radio frequency unit 501 transmits uplink data to the network-side device. Typically, the radio frequency unit 501 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and the like.

[0168] The memory 509 can be used to store software programs or instructions and various data. The memory 509 may mainly include a program or instruction storage area and a data storage area, wherein the program or instruction storage area can store an operating system, at least one application program or instruction required for a function (such as a sound playback function, an image playback function, etc.). In addition, the memory 509 may include a high-speed random access memory and may also include a non-volatile memory, wherein the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. For example, at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device.

[0169] Processor 510 may include one or more processing units. Optionally, processor 510 may integrate an application processor and a modem processor. The application processor primarily processes the operating system, user interface, and application programs or instructions, while the modem processor primarily processes wireless communications, such as a baseband processor. It is understood that the modem processor may not be integrated into processor 510.

[0170] Among them, the processor 510 is used to switch between at least two search space groups; the radio frequency unit 501 is used to perform corresponding physical downlink control channel PDCCH monitoring behavior according to the switched search space group; wherein the at least two search space groups include search space group #2, and the search space group #2 is not associated with any search space or is not associated with the first search space, and the first search space includes: a first type common search space CSS, a user-specific search space USS, and at least one CSS other than the first type CSS.

[0171] In an embodiment of the present application, by introducing search space group #2, a more flexible and diverse PDCCH monitoring effect can be achieved; when search space group #2 is not associated with any search space, the terminal switches to search space group #2 to skip PDCCH monitoring, thereby achieving the purpose of terminal energy saving; when search space group #2 is not associated with the first search space, when the terminal switches to search space group #2, at least there is no need to monitor the first search space, which also facilitates terminal energy saving.

[0172] The terminal 500 provided in the embodiment of the present application can also implement the various processes of the above-mentioned search space group switching method embodiment and achieve the same technical effect. To avoid repetition, they are not described here.

[0173] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the above-mentioned search space group switching method embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0174] The processor may be the processor in the terminal described in the above embodiment. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0175] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned search space group switching method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0176] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0177] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0178] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for enabling a terminal (which can be a mobile phone, computer, server, air conditioner, or network-side device, etc.) to execute the methods described in each embodiment of the present application.

[0179] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A search space group switching method, characterized in that: Applied to a terminal, the method includes: Switching between at least two search space groups; Perform corresponding physical downlink control channel PDCCH monitoring behavior according to the switched search space group; The at least two search space groups include search space group #2, and the search space group #2 is not associated with any search space; The performing corresponding physical downlink control channel PDCCH monitoring behavior according to the switched search space group includes: In case of switching to the search space group #2, the terminal skips PDCCH monitoring.

2. The method according to claim 1, characterized in that The at least two search space groups further include search space group #0 and / or search space group #1; and the switching between the at least two search space groups includes at least one of the following: Switching from the search space group #0 to the search space group #1; Switch from the search space group #0 to the search space group #2.

3. The method according to claim 2, characterized in that The switching between the at least two search space groups includes at least one of the following: In a case where the terminal uses the search space group #0, if the acquired first indication is a first value, switching from the search space group #0 to the search space group #1; When the terminal uses the search space group #0, if the acquired first indication is a second value, switching from the search space group #0 to the search space group #2; The first indication is carried in first downlink control information DCI.

4. The method according to claim 3, characterized in that The first DCI further includes a second indication, where the second indication satisfies at least one of the following: If the second indication obtained is the third value, the preset indication field is used for the first indication; If the acquired second indication is the fourth value, the preset indication field is used for the preset indication.

5. The method according to claim 2, characterized in that The switching between the at least two search space groups includes at least one of the following: In the case where the terminal uses the search space group #0, if the minimum available scheduling offset indicated by the acquired minimum available scheduling offset indication is equal to 0, switching from the search space group #0 to the search space group #1; In the case where the terminal uses the search space group #0, if the minimum available scheduling offset indicated by the acquired minimum available scheduling offset indication is greater than 0, it switches from the search space group #0 to the search space group #2.

6. The method according to claim 1, characterized in that The at least two search space groups further include search space group #0 and / or search space group #1; and the switching between the at least two search space groups includes at least one of the following: Switching from the search space group #2 to the search space group #0; Switching from the search space group #2 to the search space group #1; Switching from the search space group #2 to a default search space group, wherein the default search space group is any one of the at least two search space groups.

7. The method according to claim 6, characterized in that The switching from the search space group #2 to the search space group #0 or the switching from the search space group #2 to the default search space group includes: When the terminal uses the search space group #2, after the first timer expires or after a first time interval after the first timer expires, it switches from the search space group #2 to the search space group #0 or switches from the search space group #2 to the default search space group.

8. The method according to claim 1 or 2, characterized in that The method further includes: after switching to the search space group #2, starting or restarting a first timer; The first timer is used to switch from the search space group #2 to the search space group #0 or to switch from the search space group #2 to the default search space group.

9. The method according to claim 6, characterized in that The switching between at least two search space groups includes: When the terminal uses the search space group #2, if the second DCI is detected, perform at least one of the following: Switching from the search space group #2 to the search space group #0; Switching from the search space group #2 to the search space group #1; Switch from the search space group #2 to the default search space group.

10. The method according to claim 9, characterized in that The second DCI is scrambled by a specific radio network temporary identifier RNTI; and / or The search space carrying the second DCI is a search space of a specific type.

11. The method according to claim 9, characterized in that The method further comprises: According to the network side device configuration, predefined rules, at least one item in the second DCI determines to switch from the search space group #2 to the search space group #0 or from the search space group #2 to the search space group #1 or from the search space group #2 to the default search space group.

12. The method according to claim 1, 2, 6 or 9, characterized in that The method further comprises: In the case where the terminal uses the search space group #2, if the third DCI is detected, the terminal continues to use the search space group #2.

13. The method according to claim 12, characterized in that The third DCI is scrambled by the group common RNTI or the broadcast RNTI.

14. The method according to claim 12, characterized in that The method further comprises: After detecting the third DCI, starting or restarting a first timer; The first timer is used to switch from the search space group #2 to the search space group #0 or to switch from the search space group #2 to the default search space group.

15. The method according to claim 2 or 6, characterized in that The network side configuration or protocol stipulates that the terminal does not support direct switching between the search space group #2 and the search space group #1.

16. The method according to claim 7, 8 or 14, characterized in that The counting unit of the first timer is: time slot, millisecond or discontinuous reception DRX cycle.

17. The method according to claim 1, wherein The switching between at least two search space groups includes: Switching the search space group of the target cell group between at least two search space groups according to the target information; The target information includes at least one of the following: a secondary cell sleep or de-sleep indication, a secondary cell activation or deactivation indication; The target cell group is a cell group other than the cell group to which the cell indicated by the target information belongs.

18. The method according to claim 17, characterized in that The at least two search space groups further include search space group #0 and / or search space group #1; and when the target information includes a secondary cell desleeping indication or a secondary cell activation indication, switching the search space group of the target cell group between the at least two search space groups according to the target information includes at least one of the following: Switching the search space group of the cell group using the search space group #2 in the target cell group to the search space group #0 or the search space group #1; The search space group of the cell group using the search space group #0 in the target cell group is switched to the search space group #1.

19. The method according to claim 17, wherein The at least two search space groups further include search space group #0 and / or search space group #1; and when the target information includes a secondary cell sleep indication or a secondary cell deactivation indication, switching the search space group of the target cell group between the at least two search space groups according to the target information includes at least one of the following: Switching the search space group of the cell group using the search space group #1 in the target cell group to the search space group #0 or the search space group #2; The search space group of the cell group using the search space group #0 in the target cell group is switched to the search space group #2.

20. The method according to claim 19, characterized in that The switching of the search space group of the target cell group between at least two search space groups according to the target information includes: If no DCI is detected during the running of the second timer, the search space group of the target cell group is switched between at least two search space groups according to the target information.

21. A search space group switching device, characterized in that: include: a switching module, configured to switch between at least two search space groups; A PDCCH monitoring module is used to perform corresponding PDCCH monitoring behavior according to the switched search space group; The at least two search space groups include search space group #2, and the search space group #2 is not associated with any search space; The PDCCH monitoring module is further configured to skip PDCCH monitoring when switching to the search space group #2.

22. The device according to claim 21, characterized in that The at least two search space groups further include search space group #0 and / or search space group #1; and the switching module is configured to: Switching from the search space group #0 to the search space group #1; Switch from the search space group #0 to the search space group #2.

23. The device according to claim 22, characterized in that The switching module is configured to: In the case of using the search space group #0, if the first indication obtained is a first value, switching from the search space group #0 to the search space group #1; In the case of using the search space group #0, if the first indication obtained is the second value, switching from the search space group #0 to the search space group #2; The first indication is carried in first downlink control information DCI.

24. The device according to claim 23, characterized in that The first DCI further includes a second indication, where the second indication satisfies at least one of the following: If the second indication obtained is the third value, the preset indication field is used for the first indication; If the acquired second indication is the fourth value, the preset indication field is used for the preset indication.

25. The device according to claim 22, characterized in that The switching module is configured to: In the case of using the search space group #0, if the minimum available scheduling offset indicated by the acquired minimum available scheduling offset indication is equal to 0, switching from the search space group #0 to the search space group #1; In the case of using the search space group #0, if the minimum available scheduling offset indicated by the acquired minimum available scheduling offset indication is greater than 0, switching from the search space group #0 to the search space group #2 is performed.

26. The device according to claim 21, characterized in that The at least two search space groups further include search space group #0 and / or search space group #1; and the switching module is configured to: Switching from the search space group #2 to the search space group #0; Switching from the search space group #2 to the search space group #1; Switching from the search space group #2 to a default search space group, wherein the default search space group is any one of the at least two search space groups.

27. The device according to claim 26, characterized in that The switching from the search space group #2 to the search space group #0 or the switching from the search space group #2 to the default search space group includes: In the case of using the search space group #2, after a first timer expires or after a first time interval after the first timer expires, switching from the search space group #2 to the search space group #0 or switching from the search space group #2 to the default search space group.

28. The device according to claim 21 or 22, characterized in that The device further comprises: A control module, configured to start or restart a first timer after switching to the search space group #2; The first timer is used to switch from the search space group #2 to the search space group #0 or to switch from the search space group #2 to the default search space group.

29. The device according to claim 26, characterized in that The switching module is configured to: In the case of using the search space group #2, if the second DCI is detected, at least one of the following is performed: Switching from the search space group #2 to the search space group #0; Switching from the search space group #2 to the search space group #1; Switch from the search space group #2 to the default search space group.

30. The device according to claim 29, characterized in that The second DCI is scrambled by a specific RNTI; and / or The search space carrying the second DCI is a search space of a specific type.

31. The device according to claim 29, characterized in that The switching module is also used to determine, based on the network side device configuration, predefined rules, and at least one item in the second DCI, whether to switch from the search space group #2 to the search space group #0 or from the search space group #2 to the search space group #1 or from the search space group #2 to the default search space group.

32. The device according to claim 21, 22, 26 or 29, characterized in that The switching module is further configured to, when using the search space group #2, continue to use the search space group #2 if a third DCI is detected.

33. The device according to claim 32, characterized in that The third DCI is scrambled by the group common RNTI or the broadcast RNTI.

34. The device according to claim 32, characterized in that The device further comprises: A control module, configured to start or restart a first timer after detecting the third DCI; The first timer is used to switch from the search space group #2 to the search space group #0 or to switch from the search space group #2 to the default search space group.

35. The device according to claim 22 or 26, characterized in that The network side configuration or protocol stipulates that the search space group switching device does not support direct switching between the search space group #2 and the search space group #1.

36. The device according to claim 27, 28 or 34, characterized in that The counting unit of the first timer is: time slot, millisecond or DRX cycle.

37. The device according to claim 21, characterized in that The switching module is configured to switch the search space group of the target cell group between at least two search space groups according to the target information; The target information includes at least one of the following: a secondary cell sleep or de-sleep indication, a secondary cell activation or deactivation indication; The target cell group is a cell group other than the cell group to which the cell indicated by the target information belongs.

38. The device according to claim 37, characterized in that The at least two search space groups further include search space group #0 and / or search space group #1; and when the target information includes a secondary cell desleeping indication or a secondary cell activation indication, the switching module is configured to: Switching the search space group of the cell group using the search space group #2 in the target cell group to the search space group #0 or the search space group #1; The search space group of the cell group using the search space group #0 in the target cell group is switched to the search space group #1.

39. The device according to claim 37, characterized in that The at least two search space groups further include search space group #0 and / or search space group #1; and when the target information includes a secondary cell sleep indication or a secondary cell deactivation indication, the switching module is configured to: Switching the search space group of the cell group using the search space group #1 in the target cell group to the search space group #0 or the search space group #2; The search space group of the cell group using the search space group #0 in the target cell group is switched to the search space group #2.

40. The device according to claim 39, characterized in that The switching module is configured to switch the search space group of the target cell group between at least two search space groups according to the target information if no DCI is detected during the running of the second timer.

41. A terminal, characterized in that: It includes a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the search space group switching method as described in any one of claims 1 to 20.

42. A readable storage medium, characterized in that The readable storage medium stores a program or instruction, and when the program or instruction is executed by the processor, the search space group switching method according to any one of claims 1 to 20 is implemented.

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